Source apportionment of mass concentration and inhalation risk with long-term ambient PCDD/Fs measurements in an urban area

作者：Ho Chi Chang; Chan Chang Chuan; Chio Chia Pin; Lai Yi Chieh; Chang Chien Guo Ping; Chow Judith C; Watson John G; Chen Lung Wen A; Chen Pau Chung; Wu Chang Fu^*

来源：Journal of Hazardous Materials, 2016, 317: 180-187.

DOI：10.1016/j.jhazmat.2016.05.059

• Polychlorinated dibenzo-p-dioxins and dibenzofuran
• Source apportionment
• Inhalation cancer risk
• Spatio-temporal variation

This study applies a receptor model to quantify source contributions to ambient concentration of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and inhalation cancer risk in Taipei from 2003 through 2009. Seventeen PCDD/F congeners were used in the effective variance solution to the Chemical Mass Balance equations to estimate source-specific mass contributions and inhalation risks. The average total PCDD/F concentration was 0.611 pg/Nm(3) (0.036 pg I-TEQ/Nm(3)). Traffic emissions contributed the most to the PCDD/F concentration (55.7%), followed by waste incinerators (18.6%) and joss stick burning (9.6%). For the inhalation cancer risk, the average was 1.1 x 10(-6) with traffic, waste incinerators, and joss paper burning as the main contributors (67.3%, 19.4%, and 6.3%, respectively). The mass and risk contributions of waste incinerators decreased significantly from 2003 to 2009 and were higher at downwind sites than at upwind sites. Reducing PCDD/F emissions from traffic and waste incinerators would provide the greatest health benefit. Policies that reduce the uncontrolled burning of joss stick and joss paper also need to be implemented.

• 出版日期2016-11-5